Most Active Speakers 2025

Sessionize proudly presents the list of the most active speakers in the year 2025!

  • 1125 speakers
  • Auto-generated
Markus Kett

Markus Kett

Markus and his teams have been working on Java IDE and database tools, frameworks as well as on various open-source projects for 20+ years. Markus is the CEO and founder of Cyrock.AI, Inc. which is the company behind the Eclipse open-source projects EclipseStore, Eclipse Serializer, and Eclipse Data Grid powering Cyrock.AI as the first vector database based on a microservices architecture. He is also the editor-in-chief for the free JAVAPRO magazine and the founder and co-organizer of the Java community conference series JCON. He is an independent editor for several magazines, and loves speaking at developer conferences and user groups around the world.

Markus and his teams have been working on Java IDE and database tools, frameworks as well as on various open-source projects for 20+ years. Markus is the CEO and founder of Cyrock.AI, Inc. which is the company behind the Eclipse open-source projects ... Show more

Martin Catherall

Martin Catherall

Martin Catherall is a Data Architect working on Microsoft Data Platform technologies. He is currently based in Brisbane, Australia.

Martin’s career has expanded from the world of SQL Server Administration and T-SQL development to encompass data engineering and architecture on the Microsoft Azure Platform.

He has over 15 years’ experience in the data industry and has been a recipient of the Microsoft Most Valuable Professional Award since 2014

When he is not engaged in data related activities, he can be found exploring the Queensland landscape (he’s recently escaped Melbourne), learning about Minecraft or Super Mario from his kids and learning the guitar – despite being tone deaf!

Martin is the co-host of DataPlatform downunder
https://www.meetup.com/en-AU/data-platform-downunder-meetup-group/

Martin Catherall is a Data Architect working on Microsoft Data Platform technologies. He is currently based in Brisbane, Australia. Martin’s career has expanded from the world of SQL Server Administration and T-SQL development to encompass data en... Show more

Spyros Gasteratos

Spyros Gasteratos

Spyros has 20 years of experience in the security world. Since the beginning of his career he has been an avid supporter and contributor of open source software and an OWASP volunteer. Currently he is interested in the harmonization of security tools and information and is currently helping large regulated companies setup and automate their AppSec programmes. He also maintains several Open Source projects including the security automation framework Smithy, and opencre.org, the worlds largest security knowledge graph. Also, he usually doesn’t speak about himself in the third person.

Spyros has 20 years of experience in the security world. Since the beginning of his career he has been an avid supporter and contributor of open source software and an OWASP volunteer. Currently he is interested in the harmonization of security tools... Show more

Lizzie Siegle

Lizzie Siegle

Lizzie serves developers in the Bay Area and beyond on Cloudflare's developer relations team and holds a Bachelor's degree in Computer Science from Bryn Mawr. She likes JavaScript, Python, and working with AI. When not organizing or attending hackathons and meetups, she enjoys tennis, ping pong, and all things Disney.

Lizzie serves developers in the Bay Area and beyond on Cloudflare's developer relations team and holds a Bachelor's degree in Computer Science from Bryn Mawr. She likes JavaScript, Python, and working with AI. When not organizing or attending hackath... Show more

Ricardo Sueiras

Ricardo Sueiras

I have spent the last 30 years spent working in the technology industry, and have over 20 years experience working with open source. I help customers solve business problems with open source technologies and cloud. I am a Developer Advocate for open source at AWS. I help increase awareness of AWS contributions in open source, and why AWS is a great place to run your open source workloads.

I have spent the last 30 years spent working in the technology industry, and have over 20 years experience working with open source. I help customers solve business problems with open source technologies and cloud. I am a Developer Advocate for open ... Show more

Diana Aguilera Reyna

Diana Aguilera Reyna

Consultora y formadora de BI. Microsoft Data Platform MVP. Data Analyst Associate.
Licenciada en Matemáticas. Máster en informática aplicada a la toma de decisiones.

Consultora y formadora de BI. Microsoft Data Platform MVP. Data Analyst Associate. Licenciada en Matemáticas. Máster en informática aplicada a la toma de decisiones. Show more

Lin Sun

Lin Sun

Lin is the Head of Open Source at Solo.io, co-chair of KubeCon + CloudNatibeCon 2026. She actively contributes to AAIF and CNCF projects. She is the author of “Sidecar-less Istio Explained” and “AI Agents in Kubernetes”, and holds more than 200 patents.

Lin is the Head of Open Source at Solo.io, co-chair of KubeCon + CloudNatibeCon 2026. She actively contributes to AAIF and CNCF projects. She is the author of “Sidecar-less Istio Explained” and “AI Agents in Kubernetes”, and holds more than 200 paten... Show more

Arend-Jan Kauffmann

Arend-Jan Kauffmann

Arend-Jan Kauffmann is CTO at Lumos 365 Ltd., a UK-based partner with a Business Central solution for the energy sector.

With over 20 years of experience with Microsoft Dynamics NAV / Business Central and 30 years of experience in the IT industry, he has a solid track record in this business. With a strong focus on architecture, design and integration, he worked in different roles and with a broad range of technologies and platforms, including C/SIDE & VS Code development, C/AL and AL, Microsoft .Net, Microsoft Azure and Office 365.

He strongly believes that knowledge increases by sharing it, not by saving it. By delivering workshops and being a frequent speaker at conferences, he can put this into practice. Since 2013 Arend-Jan is awarded as Microsoft MVP Business Solutions.

Arend-Jan Kauffmann is CTO at Lumos 365 Ltd., a UK-based partner with a Business Central solution for the energy sector. With over 20 years of experience with Microsoft Dynamics NAV / Business Central and 30 years of experience in the IT industry,... Show more

Reza Rad

Reza Rad

Reza Rad is a Microsoft Regional Director, an Author, Trainer, Speaker, and Consultant. He has a BSc in Computer engineering; he has more than 20 years of experience in data analysis, BI, databases, programming, and development mostly on Microsoft technologies. He is a Microsoft Data Platform MVP for 14 continuous years (from 2011 till now) for his dedication to Microsoft BI. Reza is an active blogger and co-founder of RADACAD. Reza is also co-founder and co-organizer of the Difinity conference in New Zealand, the Power BI & Fabric Summit (the biggest Power BI & Fabric conference), and Data Insight Summit (Chicago, USA)

CEO at RADACAD
Director at Power BI & Fabric Summit
Director at Difinity conference (Since 2017)
Microsoft Regional Director (Since 2018)
Microsoft Data Platform MVP (Since 2011)
Leader of Data, Insights, and Power BI user group in Auckland, New Zealand (Since 2013)
Microsoft Fast Track Recognized Solution Architect – Power Platform
Power BI All-Star award winner
Dynamic Communities Emerald award winner
Best-selling author of more than 13 books on BI, analytics, and Power BI
Speaker at many conferences such as Ignite, Microsoft Business Applications Summit, PASS, etc.
Blogger, and content creator
Consultant, and trainer
Microsoft Certified trainer
Microsoft Certified professional
His articles on different aspects of technologies, especially on BI, can be found on his blog: https://radacad.com/blog.

He wrote some books on Microsoft BI and also is writing some others, He was also an active member on online technical forums such as MSDN and Experts-Exchange, and was a moderator of MSDN SQL Server forums, and is an MCP, MCSE, and MCITP of BI. He is the leader of the New Zealand Business Intelligence users group. He is also the author of very popular book Power BI from Rookie to Rock Star, which is free with more than 1700 pages of content and the Power BI Pro Architecture published by Apress.

He is an International Speaker in Microsoft Ignite, Microsoft Business Applications Summit, Data Insight Summit, PASS Summit, SQL Saturday and user groups. And He is a Microsoft Certified Trainer.

Reza Rad is a Microsoft Regional Director, an Author, Trainer, Speaker, and Consultant. He has a BSc in Computer engineering; he has more than 20 years of experience in data analysis, BI, databases, programming, and development mostly on Microsoft te... Show more

Pieter Op De Beéck

Pieter Op De Beéck

With 18+ years of experience, I help organisations transform collaboration for the modern workplace. Combining deep technical expertise with strong business insight, I bridge the gap between technological wonders and decision-makers; delivering strategic clarity and practical solutions.

My sessions bring together proven practices, real-world lessons, and the latest in AI-driven productivity with Microsoft Copilot. If you’re ready to unlock smarter ways of working, join me to discover what’s possible, and what’s next.

With 18+ years of experience, I help organisations transform collaboration for the modern workplace. Combining deep technical expertise with strong business insight, I bridge the gap between technological wonders and decision-makers; delivering strat... Show more

Vinit Dhatrak

Vinit Dhatrak

Vinit is a seasoned software engineer with a demonstrated history of building on-premise and cloud-native distributed systems at scale. Currently, Vinit serves as a Lead Software Engineer at DocuSign, contributing to the Docusign's Storage team. With expertise encompassing cloud storage, distributed systems, and virtualization technologies such as Kubernetes, Docker, and the Linux Kernel, Vinit stands out as a thought leader in the tech industry. Throughout his career, Vinit has held pivotal roles at notable companies like Google, Box, Commvault, and Marvell, where he played an instrumental role in developing highly scalable and distributed cloud storage solutions. His proficiency in object-oriented design and systems programming, coupled with his capability to scale infrastructures to handle concurrent requests and planet-scale storage, positions him as a true expert in his field. (https://www.linkedin.com/in/vinit-dhatrak/)

Vinit is a seasoned software engineer with a demonstrated history of building on-premise and cloud-native distributed systems at scale. Currently, Vinit serves as a Lead Software Engineer at DocuSign, contributing to the Docusign's Storage team. With... Show more

Toon Vanhoutte

Toon Vanhoutte

Hi! I'm Toon Vanhoutte, Azure Solution Architect and Microsoft Azure MVP. My duty is to design and deliver reliable, secure and scalable applications in the Azure cloud. I'm not scared to take up big challenges and to dive into development mode. Integration and APIs are my old love, generative AI solutions are my new passion!

As a managing partner of Noest, my focus is to create a vibrant, local community of Microsoft enthusiasts with a "getting-things-done" mentality. I'm a quite active member of the Microsoft Azure community and was speaker on several community and company events. I love to share my experiences and learn from others during workshops, presentations and blogs. Being an Azure MVP, I'm actively collaborating with various Microsoft / Azure product teams.

Hi! I'm Toon Vanhoutte, Azure Solution Architect and Microsoft Azure MVP. My duty is to design and deliver reliable, secure and scalable applications in the Azure cloud. I'm not scared to take up big challenges and to dive into development mode. Int... Show more

Alexander Klein

Alexander Klein

Alexander Klein is a senior Business Intelligence consultant with more than 20 years of experience. He focuses on Business Intelligence and Data Warehouse projects with Microsoft technologies like SQL Server, Power BI, Azure ML or Cognitive Services.

Since 2008, he has been a self-employed consultant in large and medium-sized projects in all sectors across Europe. He has been visiting SQL Saturdays all over Europe since 2013.Since 2017 Alexander speaks at national and international conferences / user groups about Data Warehouse, BI, Azure and AI.

Alexander Klein is a senior Business Intelligence consultant with more than 20 years of experience. He focuses on Business Intelligence and Data Warehouse projects with Microsoft technologies like SQL Server, Power BI, Azure ML or Cognitive Services.... Show more

Eduardo Spotti

Eduardo Spotti

I'm a passionate professional about business, entrepreneurship, technology, continue improving of human and technical skills to me and teams that I worked.
I'm acquired experience and knowledge in differents roles and practices that I like share and still learning from others. I was fortunate to work in the largest companies in our region and the globe. Argentine Telecom, Globant, Mercadolibre, Amazon Web Services
My mainly skill topics are SaaS, Platform engineering, SRE, Dev(Sec)Ops, Agile, Lean and Cloud Architecture.
I'm a football fan, animal lover, MMA practitioner and father of two beautiful childs.

I'm a passionate professional about business, entrepreneurship, technology, continue improving of human and technical skills to me and teams that I worked. I'm acquired experience and knowledge in differents roles and practices that I like share and... Show more

Sofía Platas

Sofía Platas

Hey! You’ve reached Sofia — I turn Azure, Power Platform, and Dynamics 365 into your business’s superhero cape. Sorry I missed your call; leave a message and I’ll architect your rescue plan ASAP!

Hey! You’ve reached Sofia — I turn Azure, Power Platform, and Dynamics 365 into your business’s superhero cape. Sorry I missed your call; leave a message and I’ll architect your rescue plan ASAP! Show more

Artur Strzalkowski

Artur Strzalkowski

Ob Intranet, Mitarbeiter-App oder Kommunikations- und Kollaborationsplattformen - Artur hat immer die richtige Lösung für dich!

Ob Intranet, Mitarbeiter-App oder Kommunikations- und Kollaborationsplattformen - Artur hat immer die richtige Lösung für dich! Show more

Eli Holderness

Eli Holderness

Eli has been in tech since being released back into the wild from studying maths at university 9 years ago. They've spent their time working in industries ranging from telecoms to biotech to analog circuit design to developer advocacy, continually getting nerd-sniped along the way. These days, they work at the Bennett Institute as a Research Software Advocate, helping to build the next generation of healthcare research tooling. In their spare time, they like to go bouldering, knit and sew, and hang out with their cat.

Eli has been in tech since being released back into the wild from studying maths at university 9 years ago. They've spent their time working in industries ranging from telecoms to biotech to analog circuit design to developer advocacy, continually ge... Show more

Mary Myers

Mary Myers

Mary entered the Dynamics community in 2018 after being an AX super user for 3 years. Mary has been helping lead SMB's for 15+ years across various industries including construction, manufacturing, food & beverage, retail, and cosmetics. After attending an App in a day class in 2019 she became hyper focused on using the Power Platform to transform the way small businesses operate. Mary's special niche is extending Dynamics Business Central with the Power Platform.

Mary is an MVP that is passionate about helping others upskill themselves. She partners with several non-profits to share her knowledge on the power platform and breaking into the tech industry with a non-tech background. She also co-leads the Tampa UG that focuses on the Power Platform and Dynamics. Her main goal at the end of the day is to help as many people as possible become the best version of themselves. 🫶

Outside of work and community she spends watcher her son play football and playing golf.

Mary entered the Dynamics community in 2018 after being an AX super user for 3 years. Mary has been helping lead SMB's for 15+ years across various industries including construction, manufacturing, food & beverage, retail, and cosmetics. After att... Show more

Lemon 🍋

Lemon 🍋

With a lifelong passion for the weirdness of the internet and a day job as a development lead for whoever hired him, Lemon spends his professional time making websites for money and his free time making websites for no money.

He's created a number of stupid things for the internet, like all the games on kinda.fun, the wikiHow guessing game damn.dog, the Google Autocomplete game idiots.win, and a bunch of other things of questionable use. He also hosts a podcast that looks at some of the internet's weirder subcultures. It is not safe for your work, unless you work somewhere really cool.

With a lifelong passion for the weirdness of the internet and a day job as a development lead for whoever hired him, Lemon spends his professional time making websites for money and his free time making websites for no money. He's created a number... Show more

Niels Berglund

Niels Berglund

Niels is a forward-thinking Software/AI Architect at Derivco, spearheading the development of innovative, AI-driven products that push the boundaries of iGaming technology. A pivotal figure in Derivco's AI initiatives, he played a key role in architecting and designing the company's first AI-driven promotion system, Arena+, setting new standards for performance and user engagement in the industry.

As a Microsoft AI MVP, Niels combines technical expertise with visionary leadership to explore the potential of AI in creating groundbreaking solutions. With a track record of designing and scaling high-performance iGaming systems, Niels is passionate about leveraging technology to redefine the gaming experience.

Niels is a sought-after presenter at technology conferences and has presented at, amongst others: Tech-ED, SQL PASS, DevWeek, SQL Bits, SQL Saturday, etc.

Niels is a forward-thinking Software/AI Architect at Derivco, spearheading the development of innovative, AI-driven products that push the boundaries of iGaming technology. A pivotal figure in Derivco's AI initiatives, he played a key role in archite... Show more

Rafik Mekki

Rafik Mekki

Rafik MEKKI
Senior Agile Coach & Trainer
Leadership Catalyst & Speaker
Creator & Co-Writer Of Infinity Guide

Rafik MEKKI Senior Agile Coach & Trainer Leadership Catalyst & Speaker Creator & Co-Writer Of Infinity Guide Show more

Rajesh Vayyala

Rajesh Vayyala

Rajesh worked as data architect, data modeler and data analyst at global firms working on technical projects that generated huge revenue. He holds master's in computer science and bachelor's in electrical and electronics engineering.

Rajesh worked as data architect, data modeler and data analyst at global firms working on technical projects that generated huge revenue. He holds master's in computer science and bachelor's in electrical and electronics engineering. Show more

Kristen Hosman

Kristen Hosman

With over 20 years in accounting, ERP systems, and Microsoft Dynamics, Kristen Hosman created Mount Evans Consulting to create accounting systems that fit each small business perfectly.

Kristen is a schooled accountant with a diverse background of accounting experience and brings these experiences and knowledge in working with small businesses to provide the solutions to fit their unique accounting needs. In addition, she is extensively involved in the Microsoft Dynamics community and regularly offers her valuable knowledge in open forums, interviews, and conference appearances.

Kristen serves on the advisory committee for Dynamics User Group (DUG). Her services and experience have earned her a renowned name, four consecutive GPUG All-Star nominations, a Granite Award, and Dynamics 365 All Star Award nomination. Kristen has also been recognized as a Microsoft MVP five years in a row, a recognition reserved for top technology experts who passionately share their knowledge with the community. As a Microsoft Certified Dynamics 365 Business Central Functional Consultant, she demonstrates a high level of domain expertise and can tackle even the most challenging projects.

With over 20 years in accounting, ERP systems, and Microsoft Dynamics, Kristen Hosman created Mount Evans Consulting to create accounting systems that fit each small business perfectly. Kristen is a schooled accountant with a diverse background o... Show more

Eric "waldo" Wauters

Eric "waldo" Wauters

Eric “waldo” Wauters

Eric is one of the founding partners of iFacto Business Solutions and Dynex bv.

With his 21 years of technical expertise, he is an everyday inspiration to its development teams.  As development manager he continually acts upon the technical readiness of iFacto and Dynex.
   
Apart from that, Eric is also very active in BC community, where he tries to solve technical issues and shares his knowledge with other Dynamics enthusiasts. Surely, a lot amongst you will have read some of Eric’s posts, which he invariably signs with “waldo”.

Lots of people have been using and even contributing to tools he shares for free on github.

His proven track record entitled him to be awarded since 2007 as MVP (Microsoft Most Valuable Professional).

Eric “waldo” Wauters Eric is one of the founding partners of iFacto Business Solutions and Dynex bv. With his 21 years of technical expertise, he is an everyday inspiration to its development teams.  As development manager he continually act... Show more

Roger Unholz

Roger Unholz

Based in Zürich, Switzerland I have been working as a BI consultant using the Microsoft Data platfrom since 10 years. Covering all aspects of the data journey from data engineering to data visualization.

A big passion lately has been the new world of Microsoft Fabric as well as the latest advancements in AI and how to combine those two worlds.

Based in Zürich, Switzerland I have been working as a BI consultant using the Microsoft Data platfrom since 10 years. Covering all aspects of the data journey from data engineering to data visualization. A big passion lately has been the new world... Show more

Axel Labruna

Axel Labruna

My name is Axel and I'm from Argentina, where I live with my dog child Sansa. Love playing with her (and any dog), go for a walk and grab a coffee or have mate (argentinian drink :D ) in some park and read. Also series, films, friends, tech.
Oh almost forgot! I'm an (almost yet) computer engineer who loves to code and automate, nowadays very into Artificial Intelligence (surprised, right? :D ), GitHub and AWS as well!

My name is Axel and I'm from Argentina, where I live with my dog child Sansa. Love playing with her (and any dog), go for a walk and grab a coffee or have mate (argentinian drink :D ) in some park and read. Also series, films, friends, tech. Oh almo... Show more

Brenna Buuck

Brenna Buuck

Brenna Buuck is the subject matter expert at MinIO for databases and data lakehouses. A data engineer turned developer evangelist, she is passionate about coding, data, and learning. She endeavors to inspire and educate other developers about the latest tools and technologies, helping them build amazing things through code, tutorials, speaking engagements, and writing. She holds an undergraduate degree from the University of California, San Diego, and a graduate degree from San Diego State University.

Brenna Buuck is the subject matter expert at MinIO for databases and data lakehouses. A data engineer turned developer evangelist, she is passionate about coding, data, and learning. She endeavors to inspire and educate other developers about the lat... Show more

Kamal Shree

Kamal Shree

Senior Developer Advocate @Microsoft, Google Developer Expert in Flutter & Dart with 14 years of experience in Web Technologies, Android, Flutter, HarmonyOS and Microsoft M365. I have worked for multinational firms in India, the Netherlands, and the USA.
I am a Women Techmakers Ambassador!, Youtuber (whatsupcoders), Mentor @MentorCruise, and Open-Source Community Builder.

Senior Developer Advocate @Microsoft, Google Developer Expert in Flutter & Dart with 14 years of experience in Web Technologies, Android, Flutter, HarmonyOS and Microsoft M365. I have worked for multinational firms in India, the Netherlands, and the ... Show more

Marco Russo

Marco Russo

Marco is a business intelligence consultant and mentor. He wrote several books about Power BI, Analysis Service, and Power Pivot. He also regularly write articles and white papers that are available on sqlbi.com. Marco is a Microsoft MVP and an SSAS Maestro, the highest level of certification on Microsoft Analysis Services.
Today, Marco focuses his time with SQLBI customers, traveling extensively to train and consult on DAX and data modeling for Power BI and Analysis Services. Marco also teaches public classes worldwide.
Marco is a regular speaker at international conferences. He also enjoys delivering evening sessions at local user groups during his trips.

Marco is a business intelligence consultant and mentor. He wrote several books about Power BI, Analysis Service, and Power Pivot. He also regularly write articles and white papers that are available on sqlbi.com. Marco is a Microsoft MVP and an SSAS ... Show more

Wade Tetsuka

Wade Tetsuka

Wade is a CPA who brings 20 years of financial expertise and business management experience to U.S. Transactions Corp.
He was previously with Ernst & Young in San Francisco and later PriceWaterhouseCoopers in Stuttgart, Germany where he was senior engagement manger responsible for the assurance work for IBM, Sony, and several other multinational companies.
He also served as President/General Manager to three early-stage fast growth companies in the life sciences industry. He graduated from the University of Pennsylvania, Wharton School of Business with a B.S. in Economics.
U.S. Transactions Corp. was founded in 2009.
We focus on the Microsoft Dynamics space as the only integrated credit card processing solution with built-in connections to 120+ gateways and processors with access to every international currency. See USTPay on Appsource
www.ustranscorp.com/ustpay

Wade is a CPA who brings 20 years of financial expertise and business management experience to U.S. Transactions Corp. He was previously with Ernst & Young in San Francisco and later PriceWaterhouseCoopers in Stuttgart, Germany where he was senior ... Show more

Please note that Sessionize is not responsible for the accuracy or validity of the data provided by speakers.

Most Active Speakers 2025

Every year, we put together a list of the most active speakers. This list features the top 3% of speakers who have participated in events using Sessionize during the 2025.

The 3% is calculated from the pool of all speakers that have at least one accepted session in year 2025. We don't include inactive speakers or speakers that had no accepted sessions during the year. There are around 39,000 unique accepted speakers this year, the 3% is 1163. Not all of them have their speaker profiles set as public, and we respect that, so the list doesn't show all of them.

The calculation is based on the number of accepted events, that's the main criteria, but to get more refined results we also look at things like multiple sessions per event, sharing a session with a co-speaker and how big the event is. Number of submissions and declined sessions don't affect the list.

Please note that the count of events and sessions in this list does not represent the number of events and sessions from the year 2025. Instead, it shows the number of events and sessions featured on the speaker's public speaker profile; these numbers have nothing to do with the award itself.